Nonlinear Dynamic Responses of Longitudinally Corrugated Shell Under Axially Nonuniform Internal Pressure

摘要

Longitudinally corrugated shell structure is an appropriate structural element adopted in aerospace, mechanical, naval, nuclear, and weapons engineering. In the present paper, the dynamic expansion of a longitudinally corrugated shell under nonuniform internal pressure with the restriction of outside rigid bodies was studied with an efficient numerical method without element discretization along the circumferential direction. Furthermore, based on the developed numerical methodology, the authors conducted intensive investigations on the geometric parameters of the corrugated shell and revealed a characteristic configuration parameter that governs the expansion dynamics of the longitudinally corrugated shell. In addition, the type (distribution) and rate of the load, which are other important factors that can influence the dynamic behavior of the corrugated shell, are also discussed. The high computational efficiency of the algorithm and the characteristic deformation behavior of the corrugated shell revealed by our analysis make the present method more favorable than commercial software in treating the expansion system in the engineering field.